522 MR. H. W. BATES ON THE LEPIDOPTERA 



invariably associated with D. Bhoeo. Both have a Aveak, slow flight, and are generally 

 seen in company with Itliomios. of various species. 



Genus Callithomia, nov. genus. 



Generic Characters.— Re&^, palpi, and antenna; same as in Bircenna ; the long hairy 

 palpi, and their long pointed third joint, being characters which distinguish both from 

 Ithomia and its allied genera. Hind wing in the S short, subquadrate, in the ? elliptical ; 

 in both sexes with the lower disco-cellular straight, rather long, placed at an obtuse 

 angle with the median; the middle disco-cellular angulated (with a recurrent ner- 

 vtde), in the <i very long, bent, and directed outwards towards the apex of the wing. 

 Pore tibiee and tarsi in the c? rudimentary, reduced to a small knob at the tip of the 

 femur ; tarsi in the S slender, filiform, the joints not being contracted and crowded at 

 the tip. 



The shape of the wings, structure of the head, antennae, and palpi give this genus 

 very much the aspect of Bircenna, from which the neuration of the hind wing amply 

 distinguishes it. In this latter respect, it bears a similar relation to Bircenna that Thy- 

 rklia does to lletJiona. In the hind-wing neuration it resembles also the genus Ohjras, 

 but differs from it in the palpi and male fore legs. In colours it differs from Bircenna, 

 the wings being rendered opake by fulvous-coloured scales, instead of being naked and 

 hyaline. The species are very rare, and seem to be confined to the far interior of 

 Equatorial America : none have yet been noticed by authors. 



1. Callithomia Alexirrhoe, n. sp. 



Expanse, <S , 2" 2'" ; ? , 2" 7"'. <^ ■ Fore loing : above, with a large opake orange-tawny 

 spot occupying the basal third of the wing — a round spot in the middle of the cell, and a 

 line running along the apical part of the first median branch being black ; to this succeeds 

 an irregular belt of light yellow, semitransparent on its outer edge — the rest of the wing 

 from the end of the ceU being black, with a row of five large, yellowish, semitransparent 

 spots, of which the fourth is placed out of line, near to the outer margin. In the 

 $ the apical part of the outer margin has a row of three or four pale spots. Beneath, 

 the same, except that there is a marginal row of six large subtriangular silvery-white 



spots. 



Sind wing : above, subopake orange-tawny, with a row of four large subrounded black 

 spots along the wing behind the cell, of which the outermost is very small in the 3 , and 

 a marginal series of six subtriangular black spots, through which, on the edge, shine the 

 white marginal spots of the under side. Beneath, the same, except that there is a long, 

 subcostal, black stripe and a row of seven silvery-white marginal spots. Body black, 

 beneath yellow ; collar with two small yellow spots ; wing-lappets each with one large 

 spot of the same colour. Antenna? pale fulvous, the basal part black. 



I found two or three examples of this very elegant insect in the forest at St. Paulo, 

 on the Upper Amazons, flying in company with the Bhomioi and CeratinicB of the 

 locality. 



